<template>
  <div>
     <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card>
      <el-alert title="添加商品信息" type="info" show-icon :closable="false" center></el-alert>
      <el-steps :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- 标签栏 -->
      <el-form ref="addform" :model="addform" label-width="80px" :rules="addrules" label-position="top">
        <el-tabs :tab-position="'left'" v-model="activeIndex" :before-leave="beforeLeave" @tab-click="tabClicked">
          <el-tab-pane label="基本信息" name='0'>
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addform.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addform.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addform.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addform.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader v-model="addform.goods_cat" :options="cateoptions" :props="cascaderProps" @change="handleChange" clearable></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name='1'>
            <el-form-item v-for="item in manyForm" :label="item.attr_name" :key="item.attr_id">
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox v-for="(cb, i) in item.attr_vals" :label="cb" :key="i" border=""></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name='2'>
            <el-form-item v-for="item in onlyForm" :label="item.attr_name" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name='3'>
            <el-upload :action="uploadURL" :on-preview="handlePreview" :on-remove="handleRemove" list-type="picture" :headers="headersObj" :on-success="handleSuccess">
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
            <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
              <img :src="previewPath" alt="" class="preview">
            </el-dialog>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name='4'>
            <quill-editor v-model="addform.goods_introduce"></quill-editor>
            <el-button size="small" type="primary" class="addGoods" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
  </div>
</template>
<script>
import _ from 'lodash'
export default {
  data () {
    return {
      activeIndex: '',
      addform: {
        goods_name: '',
        goods_price: 0,
        goods_number: 0,
        goods_weight: 0,
        goods_cat: [],
        pics: [],
        goods_introduce: '',
        attrs: []
      },
      addrules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择', trigger: 'blur' }
        ],
        selectedKeys: [],
        cateoptions: [],
        cascaderProps: {
          label: 'cat_name',
          children: 'children',
          value: 'cat_id',
          expandTrigger: 'hover'
        }
      },
      cateoptions: [],
      cascaderProps: {
        label: 'cat_name',
        children: 'children',
        value: 'cat_id',
        expandTrigger: 'hover'
      },
      manyForm: [],
      onlyForm: [],
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      headersObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      previewPath: '',
      previewVisible: false
    }
  },
  created () {
    this.getCate()
  },
  computed: {
    cateId () {
      if (this.addform.goods_cat.length === 3) return this.addform.goods_cat[2]
      return null
    }
  },
  methods: {
    async getCate () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) return this.$message.error('获取商品分类失败')
      this.cateoptions = res.data
    },
    handleChange () {
      if (this.addform.goods_cat.length !== 3) {
        this.addform.goods_cat = []
      }
    },
    beforeLeave (activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addform.goods_cat.length !== 3) {
        this.$message.error('请选择商品分类')
        return false
      }
    },
    async tabClicked () {
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`, { params: { sel: 'many' } }
        )
        if (res.meta.status !== 200) return this.$message.error('获取参数列表失败')
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        })
        this.manyForm = res.data
      }
      if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`, { params: { sel: 'only' } }
        )
        if (res.meta.status !== 200) return this.$message.error('获取参数列表失败')
        this.onlyForm = res.data
      }
    },
    handlePreview (file) {
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    handleRemove (file) {
      const filePath = file.response.data.tem_path
      const i = this.addform.pics.findIndex(x => x.pic === filePath)
      this.addform.pics.splice(i, 1)
    },
    handleSuccess (response) {
      const picInfo = { pic: response.data.tem_path }
      this.addform.pics.push(picInfo)
    },
    add () {
      this.$refs.addform.validate(async val => {
        if (!val) return this.$message.error('输入格式不正确')
        const Form = _.cloneDeep(this.addform)
        Form.goods_cat = Form.goods_cat.join(',')
        this.onlyForm.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          Form.attrs.push(newInfo)
        })
        this.manyForm.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          Form.attrs.push(newInfo)
        })
        const { data: res } = await this.$http.post('goods', Form)
        if (res.meta.status !== 201) return this.$message.error('添加商品失败')
        this.$message.success('添加商品成功')
        this.$router.push('/goods')
      })
    }
  }
}
</script>
<style lang="less" scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.preview {
  width: 100%;
}
.addGoods {
  margin-top: 10px;
}
</style>
